Valve-grinding tool



A. LOV'ELESS.

VALVE-GRINDING TOOL. APPHCATION FILED MAY 16, 1921.

1,4;15, 592, Patented May 9, 1922.

' will! A LOVQZQSS.

Z1 WIZNESSES lNl/EIVTDR ATTORNEYS ALBERT LOVELESS, on ABERDEEN,WASHINGTON.

VALVE-GRINDING TOOL.

To all whom it'm-ag concern Be .it known that I ALBERT Lomnuss, acitizen of the United tates, and a resident of Aberdeen, in the countyof Grays. Harbor and State of Washington, have invented certain new anduseful Improvements in Valve-Grinding Tools, of which the follow in is aspecification.

' permit of'its being i justable to vary the-valves of internalcombustion engines,

and the purpose of inyinvention is-the pro-' which is constructed tosupported directly on the engine and readily operatedtherefrom toaccomplish the :effective grinding'of the valves. 3

It is .also a purpose of my invention to provide avalve grinding toolwhich is adthe pressure exerted on the valve during the grindingoperation. I will describe one form of valve grinding tool embodying myinvention andwill then point out the novel features thereof j in claims.I

In the accompanying, drawings: p F i'gurel isa view showing inperspective a conventional form of internal combustion engine with thecylinder head removed and showing applied thereto one form of valvegrinding tool embodying my invention.

Figure 2 is an enlarged detail perspective View of the tool shown inFigure 1. Figure 3 is a vertical sectional View of a portion of the toolshown in the preceding views showing the adjusting means ofthe tool forvarying the pressure exerted upon a valve.

Referring specifically to the drawings, in Which similar referencecharacters refer to similar parts, my invention inits present embodimentcomprises a supporting yoke Y formed of spring steel of substantially U-shaped formation with the longer arm 15 thereof formed with its freeend, while the short arm 17 vision of such a. tool is secured thereto bymeans of a rivet l8 and an extension or arm 19 also formed of springsteel. The extension 19 is securedin overlapped relation with respecttothe arm 17 and as a further additional securing means I provide a band20 of non-resilient material which is arranged in embracing relationwith respect, to theextension 19 and the arm 17in the manner clearlyshown in Figure 2. Adjacent the free end of the extension 19Specification 'of Letters Patent.

y invention relates to tools for'grinding anopening 16adjacent IPatented May 9,1922. 1921. SerialNoL 4695771.

an opening is provided through whichI extend spindle S the lower 21'carrying Valve engaging'pins 22 arranged at dlametrically opposed pointson the head. The upper end of the/spindle S.

an operating crank 24 carrying a handle 25. The crank 24 is secured uponthe extension 23 by means of a' nut 26'and in such manner that rotationof the crank effects rotation of upon the head 21 as will be moreclearlydescribed hereinafter. The nut N is provided flt its upper sidewith a sleeve'2.7 which loosely fits within the openlng of the extension19 with respect to the spindles. i i

with a disc-like head is formed with a fiat threaded ex ens on 23 e 21will be disposed directly above'one'of the avardl-y until such headengages thevalve with the requisite or desired degree of pressure. lViththe tool gr nding of the valve is obtained byosciltionof the head 21with a similar of the valve within its seat. Ifit to increase ordecrease the upon the valve, it will be clear that it is'only necessary'to adjust the nut immediately secure the desired pressure. y virtue ofthe fact that the yoke Yand the extension 19 are formed it will bemanifest that they provide a resilient support, for the spindle S to.permit of the operator exerting the necessary pressure movementNvertically 0 105 the spindle, the

so adjusted,-the actual is desired pressure exerted of spring steel, i Y

upon the valve with out permanent distortion of the tool.

when the grinding of one valve has been completed, the adjacent valveupon the 0pposite side of the tool can be likewise ground by looseningthe cylinder head bolt and swinging the tool so that the head 21 isdisposed directly over the valve whereupon the bolt is again tightenedto securely hold the tool in its new position.

Although I have herein shown and described only one form of valvegrinding tool embodying my invention, it is to be understood thatvarious changes and modifications may be made herein without departingfrom the spirit oi the invention or the spirit and scope of the appendedclaims.

What I claim is:

1. A valve grinding tool comprising a oke, an extension formed on theyoke, said yoke and extension being formed of resilient material, ascrew threaded spindle loosely extending through the extension, a headformed on one end of the spindle, pins carried by said head, a reducedextension formed on the other end of the spindle, a crank mounted onsaid reduced extension, a securing nut on said reduced extensionengaging said crank, and an adjusting nut on said spindle and engageablewith the first extension to effect when rotated a vertical adjustment ofsaid spindle.

2. A valve grinding tool comprising a resilient supporting yoke havingone leg eX- tended, a spindle threaded through the extended portion ofthe leg, a head on the one end of the spindle and means for rotating thespindle.

3. A valve grinding tool comprising a resilient supporting yoke havingone leg extended, a spindle threaded through the eX- tended portion ofthe leg, a head on the one end of the spindle, means for rotating thespindle and means co-acting with said extended leg portion for adjustingthe spindle vertically.

4:. In combination, an internal combustion engine, a valvegrinding toolcomprising a yoke adapt-ed when the cylinder head is removed to besecured upon the engine block by one of the cylinder head securingbolts, an extension formed on the yoke to overlie one of the valves, aspindle rotatablyv mounted in said extension, a head carried bythespindle and engageable with. said valve, means for rotating the spindleto e'lilect rotation of said head, and means engageable by the extensionfor varying the vertical position of said spindle to cause said head toengage the valve with any desired pressure.

5. A valve grinding tool of the character described comprising aresilient support, a rotatable spindle carried thereby, a head on thelower end of said spindle and adapted for engaging a valve to cause thevalve to rotate therewith, and means whereby the support may be urgedupwardly with respect to the spindle and valve with which said spindleengages for the purpose described.

ALBERT LOVELESS.

thereby :t'orce downward ly the spindle'and cause pressure upon the

